Finally, a full-featured rhythm and sound loop utility written in Flash. From Rockstar Games comes this free Web-based application that lets you create loops and mixes from a variety of sources, even your own. Mix and play with the pre-loaded library of drum and synth samples and loops, or upload your own sounds up to 1MB each in size, and even play them back at any BPM from 30 to 200!
Beaterator features a mixer, sound and loop libraries, a loop crafter, a keyboard for modifying the pitch of any sound for melodic playback, and an effects processor for adding one of 5 studio effects to any sound. By registering with Rockstar—which will sign you up for receiving announcements about Rockstar products—you can even save your creations locally by downloading them as mp3 files.
There is a lot that Rockstar has crammed into this Flash Web-app, so much so that the performance of the interface suffers, though the playback timing of the sound files seemed consistent. I experienced some interface problems with it on a PC in Firefox, but it worked just fine in Internet Explorer. It's a great utility if you have the time and patience to play around with it, and best of all, it's totally free to use. Click.